The sum of 2 numbers x and y is 10. y(x^2) will be maximum for x = ....

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26 Oct 2011 maximum

The sum of 2 numbers x and y is 10. y(x^2) will be maximum for x = ....

OPtion

1) 2
2) 5/2
3) 10/3
4) 20/3
5) 4
6) 28/3
7) 21/4
8) 6
9) 8
10) none of these

Solution

Given that x+y = 10
For y(x^2) to be maximum we should divide 10 between y and x in such a way that y/1 = x/2 = 10/(1+2)
so x = 20/3, y = 10/3

Correct Option: 4 Best Solution (0)